Filter element



June 1 G. J. LIP'SCOMB FILTER ELEMENT Original Filed May 23, 1927 Sl-I M. i i i a 1 Patented June 1 1, 1929.

UNITED STATES 1,716,786 PATENT OFFICE.

GASTON JOEL LIPSCOMB, OF MONTCLAIR, NEW JERSEY.

FILTER ELEMENT.

firiginal application filed na 'es, 1927, Serial No. 193312. Divided and this application filed May 10,

. 192s. Seria1N0.276,750.

This application, which is a division of my copending application Serial No. 193,712, filed May 23, 1927, relates to a filtering element adapted for use. in pressure and vacuum filters of the type therein disclosed. This invention aims to provide relatively thin filtering elements adapted to be assembledin a compact stack or pile constituting a filtering cartridge which may be readily inserted in or removed from such a filter, and which will have a relatively large effective filtering area within relatively small external dimensions.

The following specification and; aecompanying drawings discloseillustrative embodiments of my invention. In the drawings, which are all on the same scale,

, V Fig. 1 is a partial central vertical cross section and partial elevation of my ,improved filter, showing the construction of individual elements and the method of as sembling them; Y I

Fig. 2 is a top plan viewof half of a filter element, and

3 is a partial central vertical cross section illustrating a modified form of filter element.

In the present embodiment the filter consists of a casing 1 with a removable oil-tight cap 2. A central longitudinal supply pipe 3 projects nearly to the top of the casing and is surrounded by the filter cartridge, which comprises a plurality of individual elements,

conveniently made in the shape of wide-flat rings 4: assembled together around a tube or sleeve 5, which alsoserves as an outlet passage. The pile of rings 4 is clamped on the tube 5 between a top flange G'and a bottom nut 7, and this entire assembly is se- 1 cured in the casing between upper and. lower gaskets 8 and 9 by means of a top nut 10 threaded upon the upper end of the central supply pipe 3. By-pass valves such as 11, are contained in the top nut. The casing 1, holding elements 6, 7 and 10, packing means 8 and 9, and by-pass valves 11, do not in themselves relate to the present divisional,

application, and reference is hereby ,made to my copending application Serial N o. 193,

712, for a more complete description of these features. V Eaehfilter ring 4. of the preferred fornr illustrated in Figs. 1 and 2 comprises a layer of a suitable filtering medium 12 held between a pair of thin face sheets 13, 14 of metal or other appropriate material. Each ofthese face sheets has a large number of perforations 15 with inturned rough edges to hold the filtering material 12 in place. These inturned rough edges, embedded in the filtering material as shown, hold the face plates to the filtering material of'each ring and bind the face plates and the filtering material into a unitary structure. This is particularly desirable in the form of the invention shown in Fig. 3, as it facilitates the replacement of one ring as a unit, as hereinafter described. These perforations, as well as the uncovered inner and outer edges of each ring 4, constitute the oil passages into and out of the rings. Each ring is centrally apertured at 16 in proper size to surround the outlet tube 5 at a little distance, to per-v mit filtered oil to enter the tube through holes 17. The opposing face sheets 13', 13 and 1 1, let of adjacent rings are assembled in the order shown in Fig. 1, alternate pairs of sheets being crimped together by flanges 18 and 19, alternately at the outer and inner edges. 7 I l i Bosses 20 project outwardly from the face sheets of each ring to support and space said sheets at intermediate points;

- A modified ring construction is illustrated in Fig. 3. In this form oil-tight gaskets 21, 22 of'fiber or other suitable material replace the crimped flanges 18- and 19 at the outer and inner edges of successive adjoining face sheets. The inner edges of" the modified filter rings fit snuglyagainst the outlet tube 23, which tube is similar to the tube 5 except that it is longitudinally slotted as at 2 1,

cent perforations 15in the face sheets into the mass of filtering material 12 above and k below, filters through, and escapes by tne opposite perforations 15 into the spaces between the face sheets 14 which are crimped on their outer edges, at 18. A certain pelled to pass through a layer of the filtering material 12.

For replacement of the filter cartridge it necessar only to shut oil the oil stream and remove the e sing cap 2 and the nut 10, whereupon the cartridge assembly comprising the rings tube 5, and nut 7, can he lifted out and a. new cartridge slipped in. By merely replacing the nut and cap 2 the filter is ready for further runningwithout any adjustment. In it is desired to change an individual filte ring, this may be done by ren'ioring the bottom nut 7, slipping the pil of rings oil the tube 5 and breaking the pile at the desired point. In the form shown in 3 this can be accomplished by simply lifting off all rings above the one to be replaced and by putting in another ring with the necessary 21 and To change a. ring in the form shown in Fig. 1 it is necessary first to open the crimps 1S and 19 where the old ring to be removed and afterwards to properly crimp the taco sheets of the new ring in place. I

It will be seen from the foregoing that l have invented a filtering element adapted :lor usev in a compact, high-duty pressure or vacuum filter where simplicity of construction, certainty oit operation and ready re- :ilacement of parts are important vfactors in successful use.

in the present embodiment of my inven tion the filter elements-are illustrated and described as constructed in the form of fiat rings, but it is to be understood that the invention is not limited to this particular shape, but may be variously modi ed within the scope of the appended claims.

What I claim is:

1. in a pressure filter, filter cartridge cmnprising a plurality of flat filter rings, each of s id rings consisting of a pair of toraminous annular face sheets with a layer of filtering material therebctween, said layer being open at. the edges, and uniformly compressed throughout.

2. A filter cartridge composed of a plurality oft flat filter rings spaced apart by liquid-tight spacing; elements between the inner and outer peripheries of alternate rings, each of said rings comprising a layer of filtering material and a pair of disks, upset perforations in said disks, said upsets being directed into said filtering material.

A filter cartridge comprising a plurality of filter rings with liquid spaces therebetween, said liquid spaces being, alternately, in communication with a source of unfiltered liquid and an outlet for filtered liquid, each of said rings comprising a layer of filtering material open at the edges and of uniform consistency throughout.

l. In a pressure filter, in combination, filtering rings comprising fiat annular metal taco sheets having rough-edgedupset perforations, .Jaid sheets l sing arranged in pairs with said rough edges inwardly directed, each of said pairs haying a layer of filtering material therebetween; i

5. In a pressure filter, in combination, afilteringelement consisting of two :torami nous retaining sheets with a layer of filtering material therebetween, and projections on said sheets embedded in the filtering material and retained thereby.

6. In a vacuum filter, av filter cartridge comprising a plurality oi fiat filter rings, each of said rings consisting of a pair ioraminous annular face sheets with a layer of filtering material therebetwecn, said face sheets beinpprovided with projections embedded in' the filtering n aterial and retained therehy. i

in a filter, in combination, filtering rings comprising fiat annular metal T2160 sheets ha ing roupglredgcd upset perforations, said sheets being arranged in pairs with said rough ed; r inwardly directed, each of said pairs having a layer of filtering material therebetween.

8. in a vacuum filter, in. combination, filtering rings comprising flat annular metal face sheets haying roughedged upset perforations, said sheets being arranged. in pairs with said rough inwardly directed, each 01" said pairs having a layer of filtering material therebetween.

9. In a power filter, in combination, a series of superposed filter elements, each of said elements comprising two retaining sheets and an intermediate layer of filler" n5 material, perforations in said sheets haying ed ges projecting into said filtering material and adapted to hold the same in place, bosses on said sheets projecting oppositely to said edges and adapted to separate said filter elements, and sealing; means between adjacent elements adapted to direct the flow of fluid therethrough.

In testimony whereof, I have sig ed my name to this specification. 

